construction 12

Construction - 12 - To construct when , AC = 4 cm, BC = 4.8 cm, two sides and the angle opposite to one of them are given. (1) Draw a straight line AX (2) At A, Construct (3) From A, cut off AC = 4 cm. (4) From C, cut off CB = 4.8 cm, B lying on AX. (5) Then ..

Two sides and the angle opposite to on..

A survey of software engineers having more than ten years experience finds the average salary to be $120,000. If the standard deviation for the sample of 40 software engineers was $12,000, construct a 99% confidence interval of the mean(μ) for all engineers. => 118,102.63 <..

Age in years of twenty secondary school students visiting the zoo on a week day were recorded. The results were : 12, 16, 10, 19, 17, 10, 10, 11, 11, 11, 11, 12, 12, 11, 12, 13, 12, 14, 15, 18 Construct an ogive and find the median age and..

To bisect an angle , we are required to bisect (i) With B as centre and any suitable radius draw an arc to cut AB at D and BC at E respectively. (ii) Take any radius greater than of ED, not necessarily the previous radius. (iii) With this radius, taking points D and E as centres, draw two arcs whic..

The church is on a hill top as shown in the figure. The figure is drawn to a scale of 1 : 400. Find the cost of construction of the road to the church if the rate of construction is $10 per unit. [Given a = 12 units and b = 16 units.] => $4000 or $8000 or $80010 or $80..

The frequency distrubution table shown here is incorrectly constructed. State the reason. Class Frequency 7 - 12 3 13 - 18 1 19 - 24 4 25 - 30 6 31 - 36 2 => The upper and lower class limits should be even numbers. or The class width should be an odd number. or The upper class l..

The distance traveled (in thousands of kilometers) by female drivers in an year is as recorded. Distance traveled Number of females (Frequency) 2 0 4 4 6 7 8 18 10 24 12 27 14 14 16 6 Construct a frequency polygon and find the mean. => graph 2 and 14.69 or graph 2 and 10.58 or g..

The cumulative frequency for the distribution of the distance (in miles) that 20 randomly selected runners ran during a week is given in the ogive. Find the interquartile range for the data by constructing a box plot. => 18.5, Figure 2 or 11.2, Figure 2 or 23.5, Figure 1 or 12, ..

A box contains four types of pens: Type 1, Type 2, Type 3 and Type 4. Construct a bar graph to represent the number of pens in each type. What percent of the total number of pens belong to Type 2? Type 1 2 3 4 Number of pens 13 8 9 10 => Graph 4; 20% or Graph 2; 25% or Graph 1; 12..